55525: Near Repdigit 55..5525

First few terms (base 10): \[[5^*25_9]_n=\{23,428,4073,36878,332123,\ldots\}\]

First few terms (base 9): \[\{\text{25},\text{525},\text{5525},\text{55525},\text{555525},\ldots\}\]

General Formula:\[[5^*25_9]_n={405\cdot9^{n}-221\over8}\]

Equivalent Patterns: (none)

Table

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